<em># 扩展运算符合并列表</em>
<i>List</i> v = [ <b class='f16'>...</b>list, 3, 4, 5 ]; 	<em>// => [0,1,2,3,4,5] </em>

<em># 合并两个数为一个迭代器</em>
<i>Iterable&lt;E&gt;</i> <b>followedBy</b>(
	<i>Iterable&lt;E&gt;</i> other 			<em>// List </em>
)
Iterable v = list.<q>followedBy</q>(['a','b','c']);	<em>// => (0,1,2,a,b,c) </em>